<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>定位</title>
    <style type="text/css">

#position1{width: 100px;height:100px; background: #00CC33}
    </style>

</head>
<body>
    <div id="position1"></div>
</body>
</html>